专业课程设计小题

1函数重载定义重载函数max3用于计算三个数最大值（参数类型分别为int和double）。#include<iostream>usingnamespacestd;intmax3(intx,inty,intz){ return((x>y?x:y)>(x>z?x:z)?(x>y?x:y):(x>z?x:z));}doublemax3(doublex,doubley,doublez){ return((x>y?x:y)>(x>z?x:z)?(x>y?x:y):(x>z?x:z));}voidmain(){ inta,b,c; cout<<"Pleaseinputthreeinteger:"; cin>>a>>b>>c; cout<<"TheMaxofthreeis"<<max3(a,b,c)<<endl; doublea1,b1,c1; cout<<"Pleaseinputthreerealnumber:"; cin>>a1>>b1>>c1; cout<<"TheMaxofthreeis"<<max3(a1,b1,c1)<<endl;}2类组合定义point类，数据组员包含x,y，组员函数包含结构函数，拷贝结构函数和析构函数，和setx，getx，sety，gety四个属性函数。定义line类，端点由两个point类对象组成，包含结构函数，析构函数和计算线段长度函数getlength。在main函数中，定义line对象，并输出其长度。#include<iostream>#include<cmath>usingnamespacestd;classpoint{private: doublex,y;public: point(){} point(doublex,doubley):x(x),y(y) {} voidsetx(doublexx) { x=xx; } doublegetx(){returnx;} voidsety(doubleyy) { y=yy; } doublegety(){returny;} point(point&p) { x=p.x; y=p.y; } ~point(){}};classline{private: pointa,b;public: line(pointaa,pointbb):a(aa),b(bb) {} doublegetlength() { doublelength; length=sqrt(pow((a.getx()-b.getx()),2)+pow((a.gety()-b.gety()),2)); returnlength; } ~line(){}};voidmain(){ pointp1(2,3); pointp2(5,6); linel1(p1,p2); cout<<"Thelengthofthelineis"<<l1.getlength()<<endl;}3对象数组和函数定义student类，数据组员包含姓名name和成绩score，组员函数包含结构函数，拷贝结构函数和析构函数。定义函数voidhighestscore(students[]),输出分数最高学生姓名和分数。在main函数中定义students[N]，调用highestscore函数,输出分数最高学生姓名和分数。#include<iostream>#include<iomanip>#include<string>constintN=2;usingnamespacestd;classstudent{private: stringname; doublescore;public: student(){} student(stringn,doubles):name(n),score(s) {} student(student&s) { name=; score=s.score; } /*voidsetname(stringnn) { name=nn; } stringgetname(){returnname;} voidsetscore(doubless) { score=ss; } doublegetscore(){returnscore;}*/ voidhighestscore(students[]) { intk=0; doublemax; max=s[0].score; for(inti=1;i<N;i++) { if(max<s[i].score) { max=s[i].score; k=i; } } cout<<"Thenameis"<<s[k].name<<endl; cout<<"Highestscoreis"<<s[k].score<<endl; } ~student(){} friendostream&operator<<(ostream&os,students) { os<<<<""<<s.score<<endl; returnos; } friendistream&operator>>(istream&is,student&s) { is>>>>s.score; returnis; }};voidmain(){ students[N]; for(inti=0;i<N;i++) { cin>>s[i]; } s[N].highestscore(s);}4静态数据组员设计一个书类，能够保留书名、定价，全部书本数和总价。（将书名和定价设计为一般数据组员；将书本数和总价设计为静态数据组员）class

book{

private:

double

priece;

string

name;

static

int

num;

static

double

total;

};

int

book::num;

double

book::total;5动态内存分配定义point类，数据组员包含x,y，组员函数包含结构函数，拷贝结构函数和析构函数，和setx，getx，sety，gety四个属性函数。在main函数中，用new和delete分配和释放N个point数组。（N是const常量，N=10）#include<iostream>constintN=10;usingnamespacestd;classpoint{private: intx,y;public: point(){} point(intx,inty):x(x),y(y) {} point(point&p) { x=p.x; y=p.y; } voidsetx(intxx) { x=xx; } intgetx(){returnx;} voidsety(intyy) { y=yy; } intgety(){returny;} ~point(){}};voidmain(){ point*p=newpoint[N]; delete[]p;}6类继承定义一个point类，包含私有数据组员x，y，组员函数包含无参结构函数，带参结构函数，set和get属性函数。定义circle类，从point类公有派生，增加数据组员半径r，组员函数包含无参结构函数，带参结构函数，计算面积函数getarea。在main函数中定义一个circle对象，并计算其面积。#include<iostream>usingnamespacestd;classpoint{private: doublex,y;public: point(){} point(doublex,doubley):x(x),y(y) {} voidsetx(doublexx) { x=xx; } doublegetx(){returnx;} voidsety(doubleyy) { y=yy; } doublegety(){returny;} ~point(){}};classcircle:publicpoint{private: doubler;public: circle(){} circle(doublex,doubley,doubler):point(x,y),r(r) {} doublegetarea() { return3.14*r*r; }};voidmain(){ circlec1(2,3,4.5); cout<<"Theareaofcircleis"<<c1.getarea()<<endl;}7虚基类定义vehicle类，数据组员包含私有weight，公有结构函数，析构函数和输出函数dispaly；从vehicle类公有派生car类，增加数据组员载人数personnum，公有结构函数,析构函数和输出display；从vehicle类公有派生truck类，增加数据组员载货量laod,公有结构函数，析构函数和输出函数display；从car类和truck类共同公有派生出pickup类，包含公有结构函数和输出函数。在main函数中，定义pickup类对象，并输出其基础信息。#include<iostream>usingnamespacestd;classvehicle{private: doubleweight;public: vehicle(doublew):weight(w) {} voiddisplay() { cout<<"theweightofvehicleis"<<weight<<endl; } ~vehicle(){}};classcar:virtualpublicvehicle{private: intpersonnum;public: car(doubleww,intp):vehicle(ww),personnum(p) {} voiddisplay() { //vehicle::display(); cout<<"Thenumberofpersonis"<<personnum<<endl; } ~car(){}};classtruck:virtualpublicvehicle{private: doubleload;public: truck(doubleww,doublel):vehicle(ww),load(l) {} voiddisplay() { //vehicle::display(); cout<<"Theloadofthetruckis"<<load<<endl; } ~truck(){}};classpickup:publiccar,publictruck{public: pickup(doublew1,intp,doublew2,doublel,doublew):car(w1,p),truck(w2,l),vehicle(w) {} voiddisplay() { vehicle::display(); car::display(); truck::display(); } ~pickup(){}};voidmain(){ pickupp1(211,2,200,170,100); p1.display();}8运算符重载，友元函数和this指针定义一个计数器类counter，含有自增，自减功效（前后缀）；输入输出>>,<<功效。在main函数里测试该类。#include<iostream>usingnamespacestd;classcounter{private: doublenum;public: counter(){} counter(doublen):num(n) {} counteroperator++() { ++num; return*this; } counteroperator--() { --num; return*this; } counteroperator++(int) { counternn; nn.num=this->num; num++; returnnn; } counteroperator--(int) { counternn; nn.num=this->num; num--; returnnn; } friendostream&operator<<(ostream&os,counterc); friendistream&operator>>(istream&is,counter&c);};ostream&operator<<(ostream&os,counterc){ os<<c.num<<endl; returnos;}istream&operator>>(istream&is,counter&c){ is>>c.num; returnis;}voidmain(){ counterc1,c2; cin>>c1; c2=c1.operator++(0); cout<<"c1="<<c1; cout<<"c2="<<c2;}9虚函数和抽象类定义一个抽象类shape，包含公有计算面积area函数，计算体积volume函数，输出基础信息函数printinfo（三个函数均为纯虚函数）。从shape公有派生point类，增加私有数据组员x,y坐标，和结构函数，析构函数。从point公有派生circle类，增加私有数据组员半径r，和结构函数，析构函数。从circle公有派生cylinder类，增加私有数据组员高度h，和结构函数，析构函数。（在定义三个派生类过程中，自己考虑需要重定义哪个虚函数）。在main函数中，定义shape类指针，指向派生类对象，输出三类对象基础信息，面积，体积；（将shape指针改为引用再尝试）。#include<iostream>usingnamespacestd;classshape{public: virtualdoublearea()=0; virtualdoublevolume()=0; virtualvoidprintinfo()=0;};classpoint:publicshape{private: intx,y;public: point(intx,inty):x(x),y(y) {} voidprintinfo() { cout<<"x="<<x<<",y="<<y<<endl; } ~point(){}};classcircle:publicpoint{private: doubler;public: circle(intx,inty,doubler):point(x,y),r(r) {} doublearea() { return3.14*r*r; } voidprintinfo() { point::printinfo(); cout<<"r="<<r<<endl; //cout<<"circleareais"<<area()<<endl; } ~circle(){}};classcylinder:publiccircle{private: doubleh;public: cylinder(intx,inty,doubler,doubleh):circle(x,y,r),h(h) {} doublearea() { returncircle::area(); } doublevolume() { returncircle::area()*h; } voidprintinfo() { circle::printinfo(); cout<<"h="<<h<<endl; //cout<<"volumeis"<<volume()<<endl; } ~cylinder(){}};voidmain(){ cylinderc1(2,3,4,5); shape*s; s=&c1; (*s).printinfo(); cout<<"circleareais"<<s->area()<<endl; cout<<"volumeis"<<(*s).volume()<<endl;}10模板设计一个堆栈类模板Stack，在模板中用类型参数T表示栈中存放数据，用非类型参数MAXSIZE代表栈大小。#include<iostream>//constintMAXSIZE=5;usingnamespacestd;template<typenameT,intMAXSIZE>classstack{private: Ta[MAXSIZE]; inttop;public: stack():top(0) {} voidpush(intx) { if(top==MAXSIZE) cout<<"thestackisfull"<<endl; else a[top]=x; top++; } Tpop() { if(top==0) cout<<"thestackisempty"<<endl; else top--; returna[top]; }};voidmain(){ stack<int,5>s; s.push(1); cout<<s.pop()<<endl;;}11文件读写定义学生类数组，有N个人（N=5），包含姓名和语数外三名课成绩，经过重载<<和>>运算符实现学生数组文件读写。（姓名用stringname;）#include<iostream>#include<fstream>#include<string>#include<iomanip>constintN=3;usingnamespacestd;classstudent{private